Question

我想知道如何根据建议使用ActiveMQ进行测试的答案使用ActiveMQ来测试JMS Simulating JMS - jUnit

但是，我没有收到MessageConsumer所期望的消息。如果我用过它就会挂在那里。

这是我的代码

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;
import org.junit.Assert;
import org.junit.Test;

public class JmsTest {
@Test
public void test() throws Exception {
    final ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
            "vm://localhost?broker.persistent=true");
    final Queue queue;
    final Connection connection = connectionFactory.createConnection();
    final Session session = connection.createSession(true,
            Session.AUTO_ACKNOWLEDGE);
    {
        queue = session.createQueue("test");
    }
    {
        final MessageProducer producer = session.createProducer(queue);
        final TextMessage message = session.createTextMessage("testing");
        producer.send(message);
    }
    {
        final MessageConsumer consumer = session.createConsumer(queue);
        final TextMessage message = (TextMessage) consumer.receiveNoWait();
        // "message" is null at this point
        Assert.assertEquals("testing", message.getText());
    }
}
}

Answer 1

在收到消息之前，您需要调用connection.start（），否则不会向消费者分派任何消息。此外，您的代码不应该假设receiveNoWait将始终返回消息，因为消息可能需要花费一小段时间才能出列并路由到使用者，因此尝试在那里重试或使用调用的定时receive（）可能是适当。

Answer 2

谢谢蒂姆，我们几乎在同一时间找到了它，但我必须做一些其他修改，正如我在评论中指出的那样。简而言之，我必须确保“transactional”属性为“false”，并且Tim已经注意到我必须执行connection.start（）调用。

@Test
public void test() throws Exception {
    final ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(
            "vm://localhost?broker.persistent=false");

    final Connection connection = connectionFactory.createConnection();
    connection.start();
    final Session session = connection.createSession(false,
            Session.AUTO_ACKNOWLEDGE);
    final Queue queue = session.createTemporaryQueue();
    {
        final MessageProducer producer = session.createProducer(queue);
        final TextMessage message = session.createTextMessage("testing");
        producer.send(message);
    }
    {
        final MessageConsumer consumer = session.createConsumer(queue);
        final TextMessage message = (TextMessage) consumer.receiveNoWait();
        Assert.assertNotNull(message);
        Assert.assertEquals("testing", message.getText());
    }
}

Answer 3

使用主题看起来像这样：

        final ConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
        final javax.jms.Connection connection = connectionFactory.createConnection();
        connection.setClientID("12345");
        connection.start();

        final Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        final Topic temporaryTopic = session.createTemporaryTopic();

        final MessageConsumer consumer1 = session.createConsumer(temporaryTopic);

        final MessageProducer producer = session.createProducer(temporaryTopic);
        producer.send(session.createTextMessage("Testmessage"));

        final TextMessage message = (TextMessage)consumer1.receiveNoWait();


        Assert.assertNotNull(message);
        Assert.assertEquals("testing", message.getText());

ActiveMQ的测试用例

3 个答案: